/* ─── RESET & VARIABLES ─────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:       #0a0a0f;
  --surface:  #13131c;
  --surface2: #1c1c28;
  --border:   rgba(255, 255, 255, 0.08);
  --accent:   #c8f53e;
  --accent2:  #ff5c5c;
  --accent3:  #5cf5c8;
  --text:     #f0f0f0;
  --muted:    #6b6b80;
  --round:    12px;
}

/* ─── BODY & APP SHELL ───────────────────────────────────── */
body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 0;
}

.app {
  width: 100%;
  max-width: 400px;
}

/* ─── SCREENS ────────────────────────────────────────────── */
.screen {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.875rem;
}

.screen.active {
  display: flex;
}

/* ─── TYPOGRAPHY UTILITIES ───────────────────────────────── */
.logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.9rem;
  letter-spacing: 0.04em;
  color: var(--accent);
  line-height: 1;
  text-align: center;
}

.logo span { color: var(--text); }

.tagline {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: center;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-top: -0.25rem;
}

.section-label {
  font-size: 0.67rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  width: 100%;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 0.125rem 0;
}

.science-note {
  font-size: 0.65rem;
  color: var(--muted);
  text-align: center;
  opacity: 0.5;
  line-height: 1.5;
  padding: 0 0.5rem;
}